What is an Object List? Do I need to create an Object List before analyzing the design?

An Object List is a collection of one or more design objects. An Object List is not needed to analyze a design because a rule or DRC can be run on the entire design. Creation of Object Lists limits the scope of a rule because the rule or DRC can then be run on a specific Object List such as a collection of differential pairs or collection of resistors, etc. For more information about Object Lists, view this video.